Looking for a little advice on the timing numbers I just pulled from my 73’ Duster (backfire issue)

Thanks, looks like I’ll need to brush up on a few YouTube tutorials on how to do it…wish I had an air/fuel ratio gauge but maybe that’s something I’ll try installing this winter.
Ignore the you tubers, and you don't need an AFR gage. If you were doing idle AFR then you really need a CO meter, just like it was done when your car was new - but that was for emissions reasons.